Java PrintWriter - What's wrong?

Question

I have the following lines of code in a program...everything is kosher in terms of imports, exceptions, variables, etc.

PrintWriter writer = new PrintWriter("Record.txt");
writer.println(firstName+" "+lastName);

All I am trying to do is write the two string variables to a text file. This should do it as far as I can tell but it only creates the file and nothing ever gets written to it. What am I doing wrong?

? · Accepted Answer

I think, you doesn’t properly close printwriter object, use the below code and modify your own requirement.

import java.io.*;
class X{
    public static void main(String [] args){
     
        try{
            PrintWriter p = new PrintWriter("D://1.txt");
            p.println("Here your content");
            p.close();
        }
        catch(Exception ex){
            ex.printStackTrace();
        }
      
    }
}


I hope this help.

Anonymous · Answer

I'd say the while-condition is failing right off the bat. Beginner trap #105: Assuming a file open operation will always work. Don't. Always check the return value for a failure indication and report it. Most likely reason is that the file is in the wrong directory. Hope that helps.

Sumant K · Answer

writer.ptintln(..); would not write the data into file, it just for printing the data on console. 
you need to use writer.write(...);

Why do you want to use PrintWriter object, why dont you use FileWriter to write the file? 

Use the following code to write the file, if you like

Writer output = null;
    String text = "firstName";
    File file = new File("Record.txt");
   BufferedWriter output = new BufferedWriter(new FileWriter(file));
    output.write(text);
    output.close();

Java PrintWriter - What's wrong?

3 Answers